TY - JOUR
T1 - Sustainable self-charging aqueous zinc-ion battery using calcium vanadate cathode derived from concrete waste
AU - Alhassan, Haneen Mohammed
AU - Hussain, Arshad
AU - Hardianto, Yuda Prima
AU - Basha, Shaik Inayath
AU - Rifky Hakim, Ananda Sholeh
AU - Mirghni, Abdulmajid A.
AU - Aziz, Md Abdul
N1 - Publisher Copyright:
© 2025 Elsevier B.V.
PY - 2026/2/1
Y1 - 2026/2/1
N2 - Self-charging aqueous zinc-ion batteries (AZIBs) are emerging as promising candidates for off-grid and autonomous energy storage, particularly where access to external power sources is limited. In this study, we report a novel AZIBs featuring a calcium vanadate (CaVO) cathode synthesized via a sustainable hydrothermal method using calcium hydroxide derived from concrete waste. Structural and morphological characterizations confirm the formation of nanostrip-shaped CaVO with high crystallinity and porosity, ideal for ion diffusion. Electrochemical tests reveal a high reversible capacity of 155 mAh g−1 at 0.1 A g−1, excellent rate capability, and low charge-transfer resistance. Notably, the battery demonstrates spontaneous air-driven self-charging behavior, enabled by the oxidation of reduced vanadium species through ambient oxygen via the oxygen reduction reaction (ORR). Compared to CaVO without concrete, the concrete-derived version exhibits superior redox reversibility, structural stability, and self-charging efficiency. This work introduces a cost-effective and eco-friendly approach for producing air-rechargeable AZIBs, integrating waste valorization and ambient energy harvesting for use in remote, wearable, and low-power electronics.
AB - Self-charging aqueous zinc-ion batteries (AZIBs) are emerging as promising candidates for off-grid and autonomous energy storage, particularly where access to external power sources is limited. In this study, we report a novel AZIBs featuring a calcium vanadate (CaVO) cathode synthesized via a sustainable hydrothermal method using calcium hydroxide derived from concrete waste. Structural and morphological characterizations confirm the formation of nanostrip-shaped CaVO with high crystallinity and porosity, ideal for ion diffusion. Electrochemical tests reveal a high reversible capacity of 155 mAh g−1 at 0.1 A g−1, excellent rate capability, and low charge-transfer resistance. Notably, the battery demonstrates spontaneous air-driven self-charging behavior, enabled by the oxidation of reduced vanadium species through ambient oxygen via the oxygen reduction reaction (ORR). Compared to CaVO without concrete, the concrete-derived version exhibits superior redox reversibility, structural stability, and self-charging efficiency. This work introduces a cost-effective and eco-friendly approach for producing air-rechargeable AZIBs, integrating waste valorization and ambient energy harvesting for use in remote, wearable, and low-power electronics.
KW - Aqueous zinc-ion batteries
KW - CaVO
KW - Concrete waste
KW - Self-charging
KW - Sustainable
UR - https://www.scopus.com/pages/publications/105021126361
U2 - 10.1016/j.matchemphys.2025.131772
DO - 10.1016/j.matchemphys.2025.131772
M3 - Article
AN - SCOPUS:105021126361
SN - 0254-0584
VL - 349
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
M1 - 131772
ER -